Mayer 1

Number of stars per data source

	Reference  478 :   23 stars
	Reference  520 : 15123 stars

478: Kharchenko N.V., Piskunov A.E., Röser S., Schilbach E., Scholz R.-D.; (2005) Astron. Astrophys. 438, 1163; Astrophysical parameters of galactic open clusters; 2005A&A...438.1163K
520: Maciejewski G., Niedzielski A.; (2008) Astron. Nachr. 329, 602; Photometric study of 9 doubtful open clusters; 2008AN....329..602M